You may not realise it but you can make your icons and windows on your screen display at a smaller size (resolution) so that you can fit more on the screen.
One of the easiest is to right click on the desktop (anywhere that you don’t have an icon) and if choose Screen Resolution
You will then be presented with the following screen
Click on the drop down arrow on the resolution box (highlighted above) and choose the recommended screen resolution.
Click on OK to accept the changes. You should then see everything change on your screen and all your icons appear smaller.